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Prior to 1969, airworthiness standards for civil aircraft in the United States Federal Aviation Regulations specified that distances were to be in statute miles, and speeds in miles per hour. In 1969, these standards were progressively amended to specify that distances were to be in nautical miles, and speeds in knots. [12]
So an intensity of 115 kn is rated Category 4, but the conversion to miles per hour (132.3 mph) would round down to 130 mph, making it appear to be a Category 3 storm. Likewise, an intensity of 135 kn (~155 mph, and thus Category 4) is 250.02 km/h, which, according to the definition used before the change would be Category 5.
The captain then called for the flaps to be increased to 15°. The airspeed continued to slow to 135 knots (250 km/h; 155 mph). Six seconds later, the aircraft's stick shaker activated, warning of an impending stall, as the speed continued to slow to 131 knots (243 km/h; 151 mph). The captain responded by abruptly pulling back on the control ...
A basic airspeed indicator with the indicated airspeed (IAS) indicated in knots ("Kt" or "Kts" or "KIAS") -- the most common unit of measure for airspeed. Some airspeed indicators in aircraft prior to the mid-1970s indicate in miles per hour plus knots (1 knot = 1.15 mph) or kilometers per hour (1 knot = 1.85 km/h).
At 8.19 am, the flight touched down about 1,500 feet (500 yd; 457 m) beyond the runway threshold at a speed of 145 knots (167 mph; 269 km/h) alongside a tailwind of 3 knots (3.5 mph; 5.6 km/h). Upon landing, the captain reversed the engines and deployed the ground spoilers alongside the wheel brakes. However, the braking actions were poor due ...
The service is based at a hangar at Newquay Airport (EGHQ), [9] The helicopter can be airborne within two minutes of an emergency call and flies at 145 knots (167 mph; 269 km/h). [10] It can cover the entire county in an average of 12 minutes and reach the Isles of Scilly in 28 minutes. [9]
The three-aircraft Zveno-SPB had a total takeoff weight of 22,000 kg (49,000 lb), a top speed of 268 km/h (145 knots, 165 mph), [2] and a range of 2,500 km (1,350 NM, 1,550 mi). [ 4 ] [ page needed ] The use of a mothership increased the range of the I-16s by 80%.
At this time, according to the flight data recorder (FDR), the aircraft was at 145 knots (167 mph; 269 km/h). [ 2 ] : 3 However, the stick shaker had failed to activate. [ 2 ] : 36 The speed then decreased to 126 knots (145 mph; 233 km/h) and the aircraft entered a real stall.